Originally Posted by Monkeycmonkeydo
How many miles are you at? I have noticed a substantial increase in "butteriness" since I eclipsed 1200 miles. The ASS is smoother on and off and the idle is much less noticeable.
It may simply be the break-in period.
I concur, my 335, felt rough at idle and the start stop was very rough, felt the whole car shake on restart. I am now at 2700 miles and the engine is super smooth at idle and I barely notice the restart.